Know all about Greywacke and Mudstone properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke and Mudstone belong to Sedimentary Rocks.Texture of Greywacke is Clastic whereas that of Mudstone is Clastic. Greywacke appears Dull and Mudstone appears Rough and Dull. The luster of Greywacke and Mudstone is dull. Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Mudstone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Mudstone are creating artwork, pottery.